- Merge fs/ntfs/aops.c::end_buffer_read_mst_async() and
  fs/ntfs/aops.c::end_buffer_read_file_async() into one function
  fs/ntfs/aops.c::end_buffer_read_attr_async() using NInoMstProtected()
  to determine whether to apply mst fixups or not.
- Above change allows merging fs/ntfs/aops.c::ntfs_file_read_block()
  and fs/ntfs/aops.c::ntfs_mst_readpage() into one function
  fs/ntfs/aops.c::ntfs_attr_read_block(). Also, create a tiny wrapper
  fs/ntfs/aops.c::ntfs_mst_readpage() to transform the parameters from
  the VFS readpage function prototype to the ntfs_attr_read_block()
  function prototype.